Office 365 Security and Compliance

Critical Security Gap Discovered in Microsoft Teams Cookie Protection System

Critical Security Gap Discovered in Microsoft Teams Cookie Protection System

Ravi Jain
A critical Microsoft Teams cookie vulnerability, explains that security researchers discovered a flaw in how Teams encrypts authentication cookies using the weaker Data Protection API (DPAPI), rather than more secure system-level protections. This weakness allows attackers with standard user privileges to extract and decrypt sensitive session cookies using a specialized tool called teams-cookies-bof, which bypasses file locks by operating within the Teams application process. Successful exploitation grants threat actors the ability to impersonate users, read communications, and potentially expand access across the Microsoft 365 ecosystem. Finally, the text provides immediate defensive measures and long-term security recommendations from the fictional cybersecurity firm Technijian, which offers services like EDR implementation and penetration testing to mitigate this high-priority threat. ... Read More
SharePoint ToolShell Attacks

Microsoft Releases Emergency SharePoint Patches to Counter Critical Zero-Day Exploits

Ravi Jain
Critical zero-day vulnerabilities in Microsoft SharePoint, specifically detailing the "ToolShell" attack campaign that leverages flaws like CVE-2025-53770 and CVE-2025-53771 for remote code execution. It emphasizes Microsoft's emergency patch release and outlines urgent response measures organizations must take, including immediate patching, machine key rotation, and compromise detection through file system and log analysis. The document also highlights the broad impact across multiple sectors and the sophisticated nature of these global attacks, stressing the importance of ongoing security vigilance and comprehensive network assessments. Finally, it introduces Technijian as a managed IT service provider offering expertise in SharePoint security, emergency patching, monitoring, and incident response services to help organizations mitigate these threats. ... Read More
Microsoft Defender: Blocking Email Bombing Attacks

Microsoft Defender for Office 365 Now Blocks Email Bombing Attacks

Ravi Jain
Microsoft Defender for Office 365's new automated detection and blocking capabilities against email bombing attacks, a significant cybersecurity threat. It explains email bombing's mechanisms, which involve flooding inboxes to overload systems, obscure legitimate alerts, or facilitate follow-up attacks like social engineering or ransomware. The text highlights key features of Microsoft's protection, including automatic blocking and enhanced visibility, and details the rollout timeline. Finally, the source discusses best practices for email security defense and the broader impact on enterprise security, emphasizing the need for comprehensive strategies beyond automated tools. ... Read More
convoC2

convoC2: The New Red Team Tool Leveraging Microsoft Teams for Stealthy System Commands

Ravi Jain
convoC2, a new red team tool that uses Microsoft Teams to stealthily execute commands on compromised systems. It hides commands in seemingly harmless Teams messages and disguises outputs in image URLs, evading traditional antivirus detection. The tool's features include cross-platform compatibility and the ability to target external organizations. The article also discusses the security implications, emphasizing the need for enhanced log monitoring, stricter access controls, and employee training to counter such attacks. Finally, it promotes Technijian's cybersecurity services as a solution to mitigate these risks. ... Read More